/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jetbrains.kotlin.idea.core

import com.intellij.psi.JavaDirectoryService
import com.intellij.psi.PsiDirectory
import com.intellij.psi.PsiFile
import com.intellij.psi.PsiPackage
import org.jetbrains.kotlin.name.FqName
import org.jetbrains.kotlin.psi.KtFile

fun PsiDirectory.getPackage(): PsiPackage? = JavaDirectoryService.getInstance()!!.getPackage(this)

fun PsiFile.getFqNameByDirectory(): FqName {
    val qualifiedNameByDirectory = parent?.getPackage()?.qualifiedName
    return qualifiedNameByDirectory?.let(::FqName) ?: FqName.ROOT
}

fun KtFile.packageMatchesDirectory(): Boolean = packageFqName == getFqNameByDirectory()